These files contain data collected by a muon detector deployed near tornadic and non-tornadic thunderstorms in the U.S Central plains on May 16, 2025, corresponding to the results detailed in the paper found here: https://arxiv.org/abs/2601.20182. The files include data for 3 observed storms, as well as calibration measurements to account for detector tilt angle. A detailed description of file contents is below.

obs1_data_2025-05-16.txt
This file contains a list of timestamps (UnixTime) for all detector triggers between 3:47 and 3:59 PM CDT on May 16, 2025. Timestamps correspond to coincident voltage pulses output by two different scintillator panels, interpreted as an atmospheric muon detection. Note that this file combines signals seen from all directions, in comparison with the data contained in the obs_2* and obs_3* files, which report the two different directions separately. 

controldata_2025-05-16.txt
This file contains a list of timestamps (UnixTime) for all detector triggers between 5:34 and 6:11 PM CDT on May 16, 2025. This data was used to establish a clear-sky baseline muon rate that other ambient muon flux measurements could be compared to, as during the this time period no storms were within 15 kilometers of the muon detector.

obs2data_pin11_2025-05-16.txt
This file constains timestamps (UnixTime) for coincident triggers of panels A and C (labeled in the paper this data accompanies) between 4:52 and 5:11 PM CDT. During this time, this pair of panels was facing west, towards a mesocyclone located 16 kilometers away. The detector roll angle during this period was measured to be 1.3 degrees (with positive roll angle being defined as clockwise rotation about the central detector axis, if the detector is viewed from the front). 

obs2data_pin13_2025-05-16.txt
This file constains timestamps (UnixTime) for coincident triggers of panels B and C (labeled in the paper this data accompanies) between 4:52 and 5:11 PM CDT. During this time, this pair of panels was facing east, directly away from a mesocyclone located 16 kilometers away. The detector roll angle during this period was measured to be 1.3 degrees (with positive roll angle being defined as clockwise rotation about the central detector axis, if the detector is viewed from the front). 

obs3data_pin11_2025-05-16.txt
This file constains timestamps (UnixTime) for coincident triggers of panels A and C (labeled in the paper this data accompanies) between 8:04 and 8:14 PM CDT. During this time, this pair of panels was facing south, directly away from the target line of storms 4 km to the north. The detector roll angle during this period was measured to be 6.8 degrees (with positive roll angle being defined as clockwise rotation about the central detector axis, if the detector is viewed from the front). 

obs3data_pin13_2025-05-16.txt
This file constains timestamps (UnixTime) for coincident triggers of panels B and C (labeled in the paper this data accompanies) between 8:04 and 8:14 PM CDT. During this time, this pair of panels was facing east, directly away from a mesocyclone located 16 kilometers away. The detector roll angle during this period was measured to be 1.3 degrees (with positive roll angle being defined as clockwise rotation about the central detector axis, if the detector is viewed from the front). 

calib_pin11.csv
This file contains calibration data that can be used to correct for roll angle when using the directional muon data files above. Data in this file describes calibration measurements of the trigger rate measured by coincident triggers of panels A and C, as a function of detector roll angle (with positive roll angle being defined as clockwise rotation about the central detector axis, if the detector is viewed from the front). This file contains two columns: roll angle in degrees, and the average rate of coincident triggers of panels A and C in units of hertz. As the roll angle increases, the trigger rate of panels A and C will naturally increase due to geometric effects (panels A and C become more vertically aligned, increasing the effective area for the more vertical component of the atmospheric muon flux). Positive roll angle is defined as clockwise rotation about the central detector axis, if the detector is viewed from the front. 

calib_pin13.csv
This file contains calibration data that can be used to correct for roll angle when using the directional muon data files above. Data in this file describes calibration measurements of the trigger rate measured by coincident triggers of panels B and C, as a function of detector roll angle (with positive roll angle being defined as clockwise rotation about the central detector axis, if the detector is viewed from the front). This file contains two columns: roll angle in degrees, and the average rate of coincident triggers of panels A and C in units of hertz. As the roll angle increases, the trigger rate of panels B and C will naturally decrease due to geometric effects (panels B and C become angled away from the vertical decreasing the effective area for the more vertical component of the atmospheric muon flux). Positive roll angle is defined as clockwise rotation about the central detector axis, if the detector is viewed from the front.
